Electric heater



w. A, MoRmsoN AND F. n. LAKE.

ELECTRIC HEATER.

APPLlcMloN F1150 Amma. 191e.

Patented Mar. '29, 1921;

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WILLIAM ANDREW MORRISON AND FREDERICK DELIMER LAKE, or SRC'ATR'ARINES,

ONTARIO, CANADA. y. Y

ELECTRIC HEATER'.

To all whom t may concern.'

Be it known that we, WILLIAM ANDREW MORRISON and FREDERICK DELIMER LAKE, both of the city of St. Catharines, county of Lincoln, Province of Ontario, Canada, have invented certain new and useful Improvements in Electric Heaters, of which the following is the specification.

Our invention relates to improvements in electric heaters, and the objectof the invention is to devise a simple, cheap, compact, highly efficient form of electric heater in which the heating element may be quickly and easily removed for the purpose of repair without damage to any part of the heater and it consists essentially of the following arrangement and construction of parts as hereinafter more particularly eX- plained. 1

Figure 1, is a side elevation of our heater.

Fig. 2, is a vertical sectional view through Fig'. 1.

ig. 3, S xH-Ky.

Fig. 4, is a cross sectional view in line lW-(g/l 2.

Fig. 5, is a cross Sectional View in line m277-y27 2- Fig. 6, is the end of the heater looking at the bottom.

In drawings like characters of reference indicate the corresponding parts in the various figures.

1 indicates the outer casing which is cya cross sectional view in line lindrical in form and which is provided at its upper end with a head 2 having an outlet orifice 3 from which leads the discharge pipe 4. At the lower end the casing 1 is provided with a head 5 having a circular orifice 6 around the edge of which extends a rabbet groove 7. 8 is an inner'cylinder provided with a closed upper end 9. The lower end of the cylindrical casing fits in the rabbet groove 7. The interior diameter of the casing corresponds to the diameter.

of the orifice 6. A space 10 is formed between the outer and inner casing through which the water to be heated passes t o the outlet pipe 4. 11 is an inlet pipe which 1s secured in the orifice 12 which is formed preferably in the reinforced portion 13 of 'the casing 1. 14 is a heating element. The

' heating element 14 comprises a central core 15 which is preferably formed of soap stone or other material adapted to absorb and re- Specication of Letters Patent. Patented 111211-,l 529, 1921.

Application filed August 25, 1919. l

Serial No. 319,832.

tainheat to a maximum extent.;v The core 15, as shown in the drawing, ycomprises a circular head 16 at the lower end Vfrom which extends centrally a stem portion' 17.

18 is an enlargement .which is formed above the stem 17 and integral-therewith. The enlargement 17 is provided with-lon itudinal grooves 19 spaced arrequal distance apart around the surface of thev enlargement. Above the enlargement4 18 is formed' a reduced portion 20. Above the reduced portion 2O is another enlargement 21 similar to the enlargement 18 providedwith longitudinal grooves 22 in alinement with the longitudinal grooves 19. Above the enlargement is another reducedportion 23 similar to the reduced portion 2O andabove the reduced portion 23 is anotherenlargement 24 provided with longitudinal grooves 25 in alinement with the grooves 19l and 22' of the enlargements 18 and 21. kBetween the enlargements 21 and 24 the reduced portions 20 and 23 are provided outwardly eX- tending annular flangesl 26 and 27. The

flanges 26 and 27 arel provided with a series ment 21, then through the orifice 29 of the annular ange 27 then through the longitudinal groove of the enlargement 24, then through the longitudinal groove 25 of the enlargement 24. The coil wires then return downward through the next successive groove 25, through the orifice 29 of the ange 27 Agroove 22 of the enlargement 21, orifice 29 of the fiange 26 and groove 19 of the enlargement v18. The coil wires again return upward through the next successive grooves 19, 22 and 25 and the orifice 29 of the upper end .of the core, when it again returns downward through another set of grooves 25, 22 and 19 and is secured at its opposite end to the head 16. Although we have described the core formed as above and the winding wound as above it will of course be understood that the wire winding can be be formed extending from end to end the windings of the element being held in these spiral grooves and we therefore do not desire to limit ourselves to any particular method of forming the core and winding the wire thereon. The lower end of the casing 1 formed by the cap 5 is provided with a pair of headed screws 30 and 31. 32 is an endclosure provided with an annular flange 33 having .arc-shaped slots 34 and 35 formed therein and terminating at their opposite ends'in the enlargements 36 and 37 through which the heads of the screws 30 and 3l are adapted to pass. When the heads of the screws are passed through the enlargements 36 and 37 of the yend closure 32 the end closure is given a slight turn thereby locking the closure in position. The body of the closure 32 is cylindrical in form and is provided at its lower end with an insulating disk 38 which is secured to the lower end of the closure and is provided with orifices 39 through which the lead wires pass to be connected to the windings 28 and 29. When the heater is to be used for heating water the current is turned on to pass through the windings. The heat generated by the windings is absorbed by t e soap stone core and such absorbed heat is retained for a long period of time. It will therefore be understood that in heating a certain amount of water it will be onl necessary to turn on the current for a sliort period of time in order to raise the core to `the required temperature. The current is then turned oi, the heat radiating from the core serving to complete the heating of the water and to maintain the water atthe required temperature for a considerable period of time. Although we have described our heater as applied tothe heating and a winding for of water it will of course be understood that the heating element comprising the soap stone core and windings may be utilized for various purposes such as the heating of electric irons and electric stoves, &c., furthermore the outer casing maybe dispensed with and the heating device passed through and secured in an orifice formed in the wall of the water container and will serve to heat a body of'water therein.

In case of'repair it will be readily seen that all that isnecessary to do is .to give the closure 32 a slight turning movement when it may be withdrawn from .the end of the casing 1. When this is completed the heating element 14 may be slipped from the interior of the casing, repaired and slipped back into position, the closure 32 being again placed in position. From this description it will be seen that we have devised an electric heater which is cheap to construct and in which the heating element may be gotten at, at any time for the purpose of repair, in which the current consumed will be economzed and which will maintain its temperature 'for aV considerable period of time after the current has been turned oil'.

What we claim as our invention is-- A heating element-comprising a core of heat absorblng and retaining material provided with a plurality of grooved enlargements each having the grooves thereof registeri'ng withthe groovesof adjacent enlargements, flanges between said enlargements provided with apertures correspond- Y ing in number and plosition to said grooves, t e core passing through the said apertures and dlsposed in said grooves.

`WILLIAM ANDREW MORRISON. l, 'FREDERICK DELIMER LAKE. 

